I am curious that many of you use (and prefer) Guterman. The Guterman is poly, right? So quite different from cotton thread (I don't expect nearly the lint from poly, and it's probably stronger).
I like the look of cotton thread for topstitching (haven't tried Connecting Threads) but my machine doesn't seem to like it so much.
BTW I buy my Gutermans when it's on sale at JoAnn's.